2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 "Software"), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
14 The above copyright notice and this permission notice (including the
15 next paragraph) shall be included in all copies or substantial
16 portions of the Software.
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **********************************************************************/
29 * Keith Whitwell <keith@tungstengraphics.com>
33 #include "brw_context.h"
34 #include "brw_defines.h"
37 #include "../glsl/ralloc.h"
39 /* Returns the corresponding conditional mod for swapping src0 and
43 brw_swap_cmod(uint32_t cmod
)
46 case BRW_CONDITIONAL_Z
:
47 case BRW_CONDITIONAL_NZ
:
49 case BRW_CONDITIONAL_G
:
50 return BRW_CONDITIONAL_LE
;
51 case BRW_CONDITIONAL_GE
:
52 return BRW_CONDITIONAL_L
;
53 case BRW_CONDITIONAL_L
:
54 return BRW_CONDITIONAL_GE
;
55 case BRW_CONDITIONAL_LE
:
56 return BRW_CONDITIONAL_G
;
63 /* How does predicate control work when execution_size != 8? Do I
64 * need to test/set for 0xffff when execution_size is 16?
66 void brw_set_predicate_control_flag_value( struct brw_compile
*p
, GLuint value
)
68 p
->current
->header
.predicate_control
= BRW_PREDICATE_NONE
;
71 if (value
!= p
->flag_value
) {
72 brw_push_insn_state(p
);
73 brw_MOV(p
, brw_flag_reg(), brw_imm_uw(value
));
74 p
->flag_value
= value
;
75 brw_pop_insn_state(p
);
78 p
->current
->header
.predicate_control
= BRW_PREDICATE_NORMAL
;
82 void brw_set_predicate_control( struct brw_compile
*p
, GLuint pc
)
84 p
->current
->header
.predicate_control
= pc
;
87 void brw_set_predicate_inverse(struct brw_compile
*p
, bool predicate_inverse
)
89 p
->current
->header
.predicate_inverse
= predicate_inverse
;
92 void brw_set_conditionalmod( struct brw_compile
*p
, GLuint conditional
)
94 p
->current
->header
.destreg__conditionalmod
= conditional
;
97 void brw_set_access_mode( struct brw_compile
*p
, GLuint access_mode
)
99 p
->current
->header
.access_mode
= access_mode
;
102 void brw_set_compression_control( struct brw_compile
*p
, GLboolean compression_control
)
104 p
->compressed
= (compression_control
== BRW_COMPRESSION_COMPRESSED
);
106 if (p
->brw
->intel
.gen
>= 6) {
107 /* Since we don't use the 32-wide support in gen6, we translate
108 * the pre-gen6 compression control here.
110 switch (compression_control
) {
111 case BRW_COMPRESSION_NONE
:
112 /* This is the "use the first set of bits of dmask/vmask/arf
113 * according to execsize" option.
115 p
->current
->header
.compression_control
= GEN6_COMPRESSION_1Q
;
117 case BRW_COMPRESSION_2NDHALF
:
118 /* For 8-wide, this is "use the second set of 8 bits." */
119 p
->current
->header
.compression_control
= GEN6_COMPRESSION_2Q
;
121 case BRW_COMPRESSION_COMPRESSED
:
122 /* For 16-wide instruction compression, use the first set of 16 bits
123 * since we don't do 32-wide dispatch.
125 p
->current
->header
.compression_control
= GEN6_COMPRESSION_1H
;
128 assert(!"not reached");
129 p
->current
->header
.compression_control
= GEN6_COMPRESSION_1H
;
133 p
->current
->header
.compression_control
= compression_control
;
137 void brw_set_mask_control( struct brw_compile
*p
, GLuint value
)
139 p
->current
->header
.mask_control
= value
;
142 void brw_set_saturate( struct brw_compile
*p
, GLuint value
)
144 p
->current
->header
.saturate
= value
;
147 void brw_set_acc_write_control(struct brw_compile
*p
, GLuint value
)
149 if (p
->brw
->intel
.gen
>= 6)
150 p
->current
->header
.acc_wr_control
= value
;
153 void brw_push_insn_state( struct brw_compile
*p
)
155 assert(p
->current
!= &p
->stack
[BRW_EU_MAX_INSN_STACK
-1]);
156 memcpy(p
->current
+1, p
->current
, sizeof(struct brw_instruction
));
157 p
->compressed_stack
[p
->current
- p
->stack
] = p
->compressed
;
161 void brw_pop_insn_state( struct brw_compile
*p
)
163 assert(p
->current
!= p
->stack
);
165 p
->compressed
= p
->compressed_stack
[p
->current
- p
->stack
];
169 /***********************************************************************
172 brw_init_compile(struct brw_context
*brw
, struct brw_compile
*p
, void *mem_ctx
)
176 p
->current
= p
->stack
;
177 p
->compressed
= false;
178 memset(p
->current
, 0, sizeof(p
->current
[0]));
180 p
->mem_ctx
= mem_ctx
;
184 brw_set_mask_control(p
, BRW_MASK_ENABLE
); /* what does this do? */
185 brw_set_saturate(p
, 0);
186 brw_set_compression_control(p
, BRW_COMPRESSION_NONE
);
187 brw_set_predicate_control_flag_value(p
, 0xff);
189 /* Set up control flow stack */
190 p
->if_stack_depth
= 0;
191 p
->if_stack_array_size
= 16;
193 rzalloc_array(mem_ctx
, struct brw_instruction
*, p
->if_stack_array_size
);
197 const GLuint
*brw_get_program( struct brw_compile
*p
,
202 for (i
= 0; i
< 8; i
++)
205 *sz
= p
->nr_insn
* sizeof(struct brw_instruction
);
206 return (const GLuint
*)p
->store
;
212 * Subroutine calls require special attention.
213 * Mesa instructions may be expanded into multiple hardware instructions
214 * so the prog_instruction::BranchTarget field can't be used as an index
215 * into the hardware instructions.
217 * The BranchTarget field isn't needed, however. Mesa's GLSL compiler
218 * emits CAL and BGNSUB instructions with labels that can be used to map
219 * subroutine calls to actual subroutine code blocks.
221 * The structures and function here implement patching of CAL instructions
222 * so they jump to the right subroutine code...
227 * For each OPCODE_BGNSUB we create one of these.
229 struct brw_glsl_label
231 const char *name
; /**< the label string */
232 GLuint position
; /**< the position of the brw instruction for this label */
233 struct brw_glsl_label
*next
; /**< next in linked list */
238 * For each OPCODE_CAL we create one of these.
242 GLuint call_inst_pos
; /**< location of the CAL instruction */
243 const char *sub_name
; /**< name of subroutine to call */
244 struct brw_glsl_call
*next
; /**< next in linked list */
249 * Called for each OPCODE_BGNSUB.
252 brw_save_label(struct brw_compile
*c
, const char *name
, GLuint position
)
254 struct brw_glsl_label
*label
= CALLOC_STRUCT(brw_glsl_label
);
256 label
->position
= position
;
257 label
->next
= c
->first_label
;
258 c
->first_label
= label
;
263 * Called for each OPCODE_CAL.
266 brw_save_call(struct brw_compile
*c
, const char *name
, GLuint call_pos
)
268 struct brw_glsl_call
*call
= CALLOC_STRUCT(brw_glsl_call
);
269 call
->call_inst_pos
= call_pos
;
270 call
->sub_name
= name
;
271 call
->next
= c
->first_call
;
272 c
->first_call
= call
;
277 * Lookup a label, return label's position/offset.
280 brw_lookup_label(struct brw_compile
*c
, const char *name
)
282 const struct brw_glsl_label
*label
;
283 for (label
= c
->first_label
; label
; label
= label
->next
) {
284 if (strcmp(name
, label
->name
) == 0) {
285 return label
->position
;
288 abort(); /* should never happen */
294 * When we're done generating code, this function is called to resolve
298 brw_resolve_cals(struct brw_compile
*c
)
300 const struct brw_glsl_call
*call
;
302 for (call
= c
->first_call
; call
; call
= call
->next
) {
303 const GLuint sub_loc
= brw_lookup_label(c
, call
->sub_name
);
304 struct brw_instruction
*brw_call_inst
= &c
->store
[call
->call_inst_pos
];
305 struct brw_instruction
*brw_sub_inst
= &c
->store
[sub_loc
];
306 GLint offset
= brw_sub_inst
- brw_call_inst
;
308 /* patch brw_inst1 to point to brw_inst2 */
309 brw_set_src1(c
, brw_call_inst
, brw_imm_d(offset
* 16));
312 /* free linked list of calls */
314 struct brw_glsl_call
*call
, *next
;
315 for (call
= c
->first_call
; call
; call
= next
) {
319 c
->first_call
= NULL
;
322 /* free linked list of labels */
324 struct brw_glsl_label
*label
, *next
;
325 for (label
= c
->first_label
; label
; label
= next
) {
329 c
->first_label
= NULL
;